package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AotuFillAspect {
    @Pointcut("execution(* com.sky.mapper.*.*(..))" +
            "&&  @annotation(com.sky.annotation.AutoFill)")
    public void aotuFillPointCut(){

    }


    @Before("aotuFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始公共字段填充");

        MethodSignature signature =(MethodSignature) joinPoint.getSignature();
        AutoFill autoFill=signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType=autoFill.value();

        Object[] args= joinPoint.getArgs();
        if (args==null||args.length==0){
            return;
        }

        Object entity=args[0];
        LocalDateTime now=LocalDateTime.now();
        Long currentId= BaseContext.getCurrentId();

        //根据不同的操作类型 通过反射赋值
        if (operationType==OperationType.INSERT){
//            为四个公共字段赋值
            try {
                Method setCreatTime=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME,LocalDateTime.class);
                Method setCreatUser=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER,Long.class);
                Method setUpdateTime=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class);
                Method setUpdateUser=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);

//                通过反射为对象属性赋值
                setCreatTime.invoke(entity,now);
                setCreatUser.invoke(entity,currentId);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }else if (operationType==OperationType.UPDATE){
            Method setUpdateTime= null;
            try {
                setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser=entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);

                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }

}
